Recent Brad Albing blogged about a new TI chip that acts as a gas guage for lead-acid batteries. It looked good to an innocent like myself, and I was wondering if you thought the product had any merit. Looking at it, it does seem to need to apply a load to guage the remaining charge, but so much of the topic is new to me that I would like an expert's opinion.
As Mark Twain might have said, Everyone would like to get rid of the lead-acid battery, but nobody does!
I have been working on a battery backup unit design for industrial power supplies (24VDC) for 12 years or so. There is an old English joke-
Q: How do you start a pudding race?
A: Say go (ask Max to explain)
The project has not gone anywhere because management has never allocated the resources, but the need remains. Part of the issue of the design is that you need to charge a nominal 24VDC battery with a 24VDC power supply. There are several approaches to this, buit our current proposal is a buck/boost switchmode power supply. Boost for when the battery exceeds 24V and buck for the other case.
Anyway one of the considerations is that in order to test the battery, I am told you need to drain the battery through a load. The problem is that once this test is done, the battery needs to be recharged- what happens if backup is needed during the charge cycle? Do you concur with this concept that lead-acid batteries be regularily load-tested?
Hi Ivan -- at the end of this, once you've worked your way through every battery technology known to humankind, will you be presenting an overall comparison matrix showing the various technologies in relation to each other?